Proteome analysis of membrane and cell wall associated proteins from Staphylococcus aureus

Renu Nandakumar, M. P. Nandakumar, Mark R. Marten, Julia M. Ross

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Pathogenesis of Staphylococcus aureus, an opportunistic human pathogen, is complex and involves many virulence factors including an array of surface proteins (adhesins) that promote bacterial interactions with extracellular matrix components. A better understanding of these interactions can be achieved by studying the expression of membrane and cell wall associated proteins using a proteome analysis approach. To accomplish this, our goal here was to construct a reference map of membrane and cell wall associated proteins for S. aureus. Various lytic and solubilization methods have been tested to identify a suitable methodology for detection of these proteins in two-dimensional electrophoresis (2DE). Results demonstrate that cell lysis with lysostaphin, which lyses staphylococcal peptidoglycan, followed by solubilization with urea, thiourea, amidosulfobetaine 14 (ASB 14) and dithiothreitol (DTT) is an effective method, yielding a sample comprising proteins of wide molecular ranges and isoelectric points with minimum contamination from cytosolic proteins. Mass spectrometric analysis was employed to identify the membrane and cell surface proteins present in the sample and consequently an initial proteomic map of membrane and cell wall associated proteins for S. aureus is presented.

Original languageEnglish (US)
Pages (from-to)250-257
Number of pages8
JournalJournal of proteome research
Volume4
Issue number2
DOIs
StatePublished - Mar 1 2005

Fingerprint

Proteome
Cell Wall
Staphylococcus aureus
Cells
Membranes
Protein S
Proteins
Lysostaphin
Bacterial Adhesins
Thiourea
Peptidoglycan
Dithiothreitol
Isoelectric Point
Virulence Factors
Pathogens
Electrophoresis
Proteomics
Extracellular Matrix
Urea
Membrane Proteins

Keywords

  • Cell surface proteins
  • Lysostaphin
  • Sample preparation
  • Staphylococcus aureus
  • Two-dimensional electrophoresis

ASJC Scopus subject areas

  • Biochemistry
  • Chemistry(all)

Cite this

Proteome analysis of membrane and cell wall associated proteins from Staphylococcus aureus. / Nandakumar, Renu; Nandakumar, M. P.; Marten, Mark R.; Ross, Julia M.

In: Journal of proteome research, Vol. 4, No. 2, 01.03.2005, p. 250-257.

Research output: Contribution to journalArticle

Nandakumar, Renu ; Nandakumar, M. P. ; Marten, Mark R. ; Ross, Julia M. / Proteome analysis of membrane and cell wall associated proteins from Staphylococcus aureus. In: Journal of proteome research. 2005 ; Vol. 4, No. 2. pp. 250-257.
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